SYSTEM AND METHOD FOR POSITIONING A DRILLING RIG

Abstract

A system and a method are for positioning a drilling rig arranged to drill in a ground. The system has a positioning jig including at least one coupling portion; a drilling rig including at least two coupling portions; and at least two anchoring elements including an upper coupling portion and a lower coupling portion. The lower coupling portion of the anchoring element is arranged to be releasably fixed to the ground. The upper coupling portion of the anchoring element is arranged to be connected to the coupling portion of the positioning jig and to the coupling portion of the drilling rig, so that the upper coupling portion of the anchoring element can optionally be connected to the positioning jig or the drilling rig.

Claims

1.-9. (canceled)

10. A system for positioning a drilling rig arranged to drill in a ground, the system comprising: a positioning jig including at least one coupling portion; a drilling rig including at least two coupling portions; wherein the system further comprises: at least two anchoring elements including an upper coupling portion and a lower coupling portion, wherein the lower coupling portion of the anchoring element is arranged to be releasably fixed to the ground; and the upper coupling portion of the anchoring element is arranged to be connected to either the coupling portion of the positioning jig or to the coupling portion of the drilling rig.

11. The system according to claim 10, wherein the positioning jig includes a centering device.

12. The system according to claim 11, wherein the centering device is a rod.

13. The system according to claim 10, wherein the upper coupling portion and the lower coupling portion of the anchoring element are interconnected via an articulated connection.

14. The system according to claim 13, wherein the articulated connection comprises a universal joint.

15. The system according to claim 10, wherein the upper coupling portion of the anchoring element includes means for a vertical positioning of the corresponding coupling portions belonging to the positioning jig and the drilling rig.

16. The system according to claim 15, wherein at least one of the anchoring elements includes a device for infinitely variable height adjustment of the drilling rig.

17. The system according to claim 10, wherein the anchoring element and the drilling rig are held together with a tensioning device.

18. A method for positioning a drilling rig arranged to drill in a ground, the method comprising the step of: indicating a desired center position for the drilling rig; the method being wherein it further comprises the steps of: providing a positioning jig and two anchoring elements; connecting the anchoring elements to the positioning jig; placing the center of the positioning jig in such a way that it corresponds with the desired center position for drilling rig; fixing the anchoring elements to the ground; removing the positioning jig from the anchoring elements; and connecting the drilling rig to the anchoring elements.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In what follows, examples of preferred embodiments are described, which are illustrated in the accompanying drawings, in which:

[0045] FIG. 1 shows a general view of elements for a system according to the invention, comprising a positioning jig, a drilling rig with a drill, and first, second and third anchoring elements;

[0046] FIG. 2 shows the positioning jig viewed from the front, the positioning jig being connected to the second and the third anchoring element, and the ground being even;

[0047] FIG. 3 shows the positioning jig connected to the first and the second anchoring element and a positioning rod, and the ground being uneven and comprising a concrete foundation;

[0048] FIG. 4 shows the positioning jig connected to two second anchoring elements, and the ground being uneven;

[0049] FIG. 5 shows two anchoring elements fixed to the ground and released from the positioning jig;

[0050] FIG. 6 shows the drilling rig connected to two anchoring elements;

[0051] FIG. 7 shows FIG. 6 viewed from the side;

[0052] FIG. 8 shows the same as FIG. 6, but the drill is in a drilling position in the ground; and

[0053] FIG. 9 shows a slot-shaped cut-out after drilling and after the system has been removed.

DETAILED DESCRIPTION OF THE DRAWINGS

[0054] The figures are shown in a simplified and schematic manner, and details that are not important to elucidate what is new in the invention may have been left out in the figures. The various elements in the figures are not necessarily shown to scale. Like and corresponding elements will be indicated by the same reference numbers in the figures. Any positional indications (such as over, under, between) refer to positions shown in the figures.

[0055] FIG. 1 shows a general view of elements for a system 1 for positioning a drilling rig 2 according to the invention. The system comprises:

[0056] a positioning jig 3 including two coupling portions 31;

[0057] a drilling rig 2 including two coupling portions 21, and a drill 22; and

[0058] two anchoring elements 4.

[0059] The anchoring element 4 comprises an upper coupling portion 41 and a lower coupling portion 42, the two coupling portions 41 and 42 being interconnected via a universal joint 44. The upper coupling portion 41 is arranged to be connected to the coupling portion 31 of the positioning jig 3 and the coupling portion 21 of the drilling rig 2 by the coupling portions 31 and 21 surrounding the coupling portion 41 of the anchoring element 4. The lower coupling portion 42 of the anchoring element 4 is arranged to be releasably fixed to a ground 99 (see FIGS. 2-8).

[0060] The upper coupling portion of the anchoring element 4 comprises a stepped height adjustment, shown in the form of a plurality of holes 46 arranged to receive a bolt (not shown). In use, the end faces 32 belonging to the drilling rig 2 and the positioning jig 3 rest supportingly against the bolt. By positioning the bolt in different holes 46, the height of the drilling rig 2 and the positioning jig 3 can be adjusted. The anchoring element 4 is provided with a stepped height adjustment as described.

[0061] In an alternative embodiment 4A, the anchoring element 4 may include a mechanical infinitely variable height adjustment, shown in the form of an external threaded portion 47 with a corresponding nut 43. The end faces 32 belonging to the drilling rig 2 and the positioning jig 3 rest supportingly against the nut 43. By moving the nut axially along the threaded portion 47, the height of the drilling rig 2 and the positioning jig 3 can be adjusted.

[0062] In a further alternative embodiment 4B, the anchoring element 4 may include a hydraulic infinitely variable height adjustment, shown in the form of a hydraulic cylinder 48. The end faces 32 rest supportingly against a flange 49 attached to the cylinder 48. The lower coupling portion 42 is attached to a piston rod 48b. By hydraulically adjusting the length of stroke of the piston rod 48b, the height of the drilling rig 2 and the positioning jig 3 can be adjusted.

[0063] The center spacings CC1 between the two coupling portions 31 of the positioning jig 3 and the two coupling portions 21 of the drilling rig 2 are equal.

[0064] FIGS. 2-4 show the positioning jig 3 viewed from the front, including two anchoring elements 4, 4A, 4B fixed to a flat ground 99 (FIG. 2) or uneven ground (FIGS. 3-8). The positioning jig 3 and the drilling rig 2 may be connected to identical or different anchoring elements 4, 4A, 4B.

[0065] Two anchoring elements 4, 4B, 4C are attached to the positioning jig, and the positioning jig 3 is centered over an indicated center 88C for the drilling rig. In FIGS. 3 and 4 the positioning jig 3 also includes a center rod 33. The point 33 of the center rod is positioned in the center 88C. When the positioning jig 3 is centered and the center rod 33 and the anchoring elements 4, 4B, 4C are vertical, the lower coupling portions 42 of the anchoring elements 4, 4B, 4C are fixed to the ground, for example with bolts, as shown in FIGS. 2-8.

[0066] FIG. 3 shows the anchoring element 4 fixed to the ground 99 via a concrete foundation 98. The anchoring elements 4A, 4B are fixed directly to the ground 99. The universal joint 44 makes it possible to adjust the lower coupling portions 42 in several planes so that maximum contact is achieved between the lower coupling portion 42 and the ground 99.

[0067] FIG. 5 shows two mechanically adjustable anchoring elements 4A fixed to the ground 99 after the positioning jig 3 has been removed. The center spacing CC1 is the same as for the drilling rig 2 (FIG. 1).

[0068] FIGS. 6 and 7 show the drilling rig 2 positioned for drilling. FIG. 6 shows the drilling rig 2 from the front. FIG. 7 shows the drilling rig 2 from the side. The two end faces 32 of the drilling rig are resting against the nuts 43. The nuts 43 are so adjusted that the drilling rig 2 is perpendicular. Two tension rods 23 connect the drilling rig 2 to the anchoring elements 42, so that the drilling ring 2 does not lift from the ground 99 when the drill 22 is being pushed into the round 99 during drilling. In an alternative embodiment, the tension rod 23 may be a chain, a tensioning strap, a turnbuckle or a combination of several elements.

[0069] In the longitudinal direction (FIG. 7), the drilling rig 2 is positioned with adjustable straps 24 anchored to the ground 99. In an alternative embodiment (not shown), the straps 24 may be anchored to a portion of a tree (not shown).

[0070] FIG. 8 shows the same as FIG. 6, but the drill 22 is in a drilling position for forming a slot 89 in the ground 99.

[0071] FIG. 9 shows the ground 99 after the slot 89 has been formed and the system 1 has been removed. After the system 1 has been removed, the only visible mark on the ground 99, apart from the slot 89, will, in the main, be the bolt holes 51.

[0072] It should be noted that all the above-mentioned embodiments illustrate the invention, but do not limit it, and persons skilled in the art may construct many alternative embodiments without departing from the scope of the attached claims. In the claims, reference numbers in brackets are not to be regarded as restrictive.

[0073] The use of the verb to comprise and its different forms does not exclude the presence of elements or steps that are not mentioned in the claims. The indefinite article a or an before an element does not exclude the presence of several such elements.

[0074] The fact that some features are indicated in mutually different dependent claims does not indicate that a combination of these features cannot be used with advantage.